Bulgin MPI001 Series Illuminated Push Button Switch, Momentary, Panel Mount, 19.2mm Cutout, SPST, Green LED, 24V dc,

Vandal resistant stainless steel switch body and button
Dot or ring illumination
Single pole, push to make
Bright Daylight LEDs
Separate LED terminals
750,000 mechanical operations minimum

Illumination Voltage:
Suffix
/6 → 6Vdc
/12 → 12Vdc
/24 → 24Vdc
/no suffix → The resistor is not installed. The user must select and connect an appropriate resistor in series.
See the datasheet for more details.